Ventilator.



D. K. SWARTWQUT.

VENTiLATOR.

APPLICATION men AUG.30. I915 Patented J uly 16,- 1918.

2 SHEETS-SHEET 2 ITED STATE PATENT @FFIGE.

DENTON K. SWARTWOITT, OF CLEVELAND, OHIO, ASSIGNOR TO THE OHIO BLOWER COM- PANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

VENTILATOR.

To all whom it may concern:

Be it known that, I. DENTON K. SwAn'rwoU'r, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Ventilators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates generally to ventilators, and more particularly to one of the rotary cowl type, the object of the invention being to provide a device of exceedingly few parts, all simple in construction, and so assembled or arranged as to insure cheapness in manufacture and ease and simplicity in operation; and with these objects in view, and certain others which will become apparent, the invention consists in the novel features of construction, combination, or arrangement hereinafter fully described and pointed out in the appended claim.

In the drawings forming a part of this specification I have shown one form of a rotary cowl or ventilator embodying my inventive idea, but it should be understood that certain changes and modifications can be made thereto within the scope of the claim, without departing from the broad principles of the invention.

In these drawings, Figure 1 is a perspective view of a ventilator constructed in accordance with my invention, and Fig. 2 is a vertical sectional view of the same.

In this particular embodiment of my invention, I employ a cylindrical base member 10, which may constitute the upper end of an air shaft or it may be attached to the upper end of a chimney; and above this cylindrical base member 10 is the rotary cowl or hood 11, and the principal aim or object of my invention is to support this rotary cowl upon and above the stationary base member in the simplest manner possible consistent with ease and accuracy of operation, and in accomplishing the same I provide an upright shaft or spindle 12, which is cens tered in and attached to the base member 10 and projects upwardly therefrom.

The shaft or spindle 12 is keyed in the metallic cross straps 13 and 14 by keys 15 passing through the spindle or shaft below and above the said straps 13 and 14. These straps extend diametrically across the cylindrical base member and have their angled Specification of Letters Patent.

rammed July 16, 1918.

Application filed August so, 1915. Serial No. 47,955.

ends riveted or otherwise secured to said base member, said straps 1.3 and 14 being preferably arranged at right angles to each other, thereby providing stiffening members for the cylindrical base.

The rotary cowl 11 is open at the front and closed at the rear after the fashion of cowls in general. The cowl or hood 11 has a flat top portion 16, and the rearwardly inclined portion 17 said inclined portion being of considerably greater extent than the flat portion 16.

The top, side, and bottom edges of the cowl or hood are reinforced or strengthened by a bead wire or rod 18, around which the edges are rolled as shown at 16*, thereby providing a strong and neat finish for the hood.

The inclined top portion 17 has an opening 19 produced therein at the proper point, and a flanged elongated sleeve 20 (preferably of cast metal) is securely fastened to the inclined top in alinement with the opening 19, the broad flanges 21, being bolted or riveted to the inclined top as shown. This elongated sleeve 20 is intended to receive the upper portion of the shaft or spindle 12 and is provided with a cap 22 carrying the anti-friction balls 23 held in place by a collar 24 fastened upon the reduced end of the shaft or spindle 12 above the upper end of sleeve 20, thereby providing an anti-friction bearing for supporting the rotary cowl or hood and in order to contribute to the ease and accuracy of operation I may employ a second ball bearing 25 located in the lower end of the sleeve and surrounding the shaft or spindle as shown most clearly in Fig. 2.

The cap 22 is attached to the end of the sleeve 20 by set screws 26, or by any other suitable method, and when so connected to the sleeve, constitutes with the collar on the spindle an anti-friction thrust bearing for supporting the rotary cowl.

From the above description, taken in connection with the accompanying drawings, it will be seen that I provide a rotary cowl consisting of two members, namely, the stationary cylindrical base and the rotary cowl, and that said rotary cowl is supported centrally and at a point above and without the cowl proper, and that all of the operating parts are of the simplest possible construc tion, thereby insuring ease and accuracy of operation and providing a ventilator which Will be strong and durable and not at all likely to get out of order.

Having thus described my invention, What I claim i':

A ventilator comprising a vertical-shaft or spindle and a rotary COWl or hood, said cowl ,or. hood having an axial opening in its tiopavall, and a cast metal sleeve having a flange at its lower end, said sleeve and flange being secured upon the exterior of the cowl, With the sleeve inregister With said opening, a cap secured to the upper end of the (lop ies of this patent may beiobtainediorfive cents each by addressing washington sleeve, a collar fixed to said shaft near its upperend and Within said cap, and anti friction balls arranged Within said cap above 15 said collar and surrounding the upper end of said vertical shaft or spindle for the purpose described.

In testimony whereof, I hereunto my signature in the presence of two Witnesses. 20

DENTON K. SWARTWOUT. Witnesses CHAS. E.-BRooK, HUGH B. MCGILL.

of Patents,

the, Commissioner 

